public class Android : IOperatingSystem
{
  public void Start()
  {
    Console.WriteLine("启动 Android 系统");
  }

  public void RunApp(string name)
  {
    Console.WriteLine($"在 Android 上运行应用：{name}");
  }

  public void Shutdown()
  {
    Console.WriteLine("关闭 Android 系统");
  }
}